Adding and Subtracting Decimals

What is the first crucial step when adding or subtracting decimals?

• Add or subtract the numbers.

• Place placeholder zeros.

• Line up the decimal points.

• Round the numbers to the nearest whole number.

What is the purpose of using placeholder zeros when adding or subtracting decimals?

• To make the numbers larger.

• To change the value of the number.

• To ensure all place values are aligned.

• To make the calculation easier to read.

When adding or subtracting decimals, where should the decimal point be placed in the final answer?

• At the beginning of the number.

• At the end of the number.

• Lined up directly below the decimal points in the problem.

• It depends on the size of the numbers.

What is the sum of 45.6 and 3.89?

• 48.49

• 49.49

• 49.59

• 48.59

What is the sum of 15 and 4.88?

• 19.88

• 19.00

• 19.48

• 19.80

What is the difference between 35.6 and 9.67?

• 25.93

• 26.07

• 25.07

• 26.93

What is the difference between 23 and 8.8?

• 14.2

• 15.2

• 14.8

• 15.8

Which of the following is NOT a main step for adding and subtracting decimals?

• Line up the decimals.

• Place holder zeros.

• Add or subtract.

• Round to the nearest whole number before calculating.